.course {
    background: #f8f8f8;
    height: auto;
    min-height: 100%;
    padding-top: .2rem;
    width: 100%;
    float: left;
    clear: both;
}

.class-lecture{
    position: relative;
    padding-bottom: 23rem;
    box-sizing: border-box;
}
.class-lecture .wornWarmimg{
    position: absolute;
    bottom: 12rem;
    left: 0;
    padding: 0 3rem;
    font-size: 2.8rem;
    color: #666;
}
.class-lecture .lecture-list{
    margin-bottom: 0;
}


.course-back {
    position: relative;
    top: -.2rem;
}

.student-name {
    height: 8rem;
    line-height: 8rem;
    font-size: 2.8rem;
    color: #333;
    margin-bottom: 2rem;
    background: white;
    padding: 0 4.5rem;
}

.course-list {
  padding-bottom: 10rem;
}
.course-list li {
    background: white;
    transform: translateX(0px);
    width: 100%;
    display: flex;
    transition: transform .5s;
    padding: 0;
    position: relative;
    margin: 2rem 0;
}
.course-detail {
    padding: 0 4rem;
    background: #fff;
}
.lecture-list {
    background-color: #fff;
    padding: 0 4rem 1rem;
    margin-bottom: 10.8rem;
}
.lecture-list ul{
    display: flex;
    flex-wrap: wrap;
}
.lecture-li {
    width: 24%;
    background-color: #e5f5f6;
    border-radius: 6px;
    margin-bottom: 3rem;
    font-size: 2.4rem;
    height: 8.5rem;
    color: #333;
    padding: 0.5rem 0;
    line-height: 1.4;
    box-sizing: border-box;
    text-align: center;
    background: url("../../img/lecture-click.png") no-repeat;
    background-size: 100% 100%;
}
.lecture-li:nth-child(4n + 2){
    margin: 0 0.666% 0 1.333%;
}
.lecture-li:nth-child(4n + 3){
    margin: 0 1.333% 0 0.666%;
}
.lecture-active {
    background: url("../../img/lecture-active.png") no-repeat;
    background-size: 100% 100%;
}
.lecture-disabled {
    background: url("../../img/lecture-disabled.png") no-repeat;
    background-size: 100% 100%;
}
.lecture-num {
    padding-left: 0.2rem;
    font-size: 2.8rem;
}
.icon-next {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 8.8rem;
    line-height: 8.8rem;
    color: white;
    font-size: 3.6rem;
    background: #3271f1;
    text-align: center;
}